Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arthur J. Guerra, APRN

Adult Psychiatric/Mental Health Clinical Nurse Specialist in Hartford, CT · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1639268626

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Registry record

Entity type Individual (Type 1)

Name Arthur J. Guerra

Credential APRN

Sex Male

Practice address 200 Retreat Avenue, Hartford Hospital Psychiatry Dept, Hartford, CT, 06106

Phone (860) 545-7063

Enumeration date Oct 11, 2006

Last updated in NPPES Jul 3, 2018

Taxonomy & licenses

364SP0809X Adult Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 000754 (CT) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
004007548	Medicaid	CT	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Arthur Guerra?

Arthur Guerra is registered in NPPES with the primary taxonomy of Adult Psychiatric/Mental Health Clinical Nurse Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-03.